<template>
  <div class="home-category" @mouseleave="categoryId = ''">
    <ul class="menu">
      <li
        :class="{ active: categoryId === item.id }"
        v-for="item in menuList"
        :key="item.id"
        @mouseenter="categoryId = item.id"
      >
        <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
        <template v-if="item.children">
          <RouterLink
            v-for="sub in item.children"
            :key="sub.id"
            :to="`/category/sub/${sub.id}`"
            >{{ sub.name }}</RouterLink
          >
        </template>
        <template v-else>
           <!-- 骨架 -->
           <XtxSkeleton width="60px" height="18px" animated  style="margin-right:5px" bg="rgba(255,255,255,0.2)"/>
           <XtxSkeleton width="50px" height="18px" animated bg="rgba(255,255,255,0.2)"/>
        </template>
      </li>
    </ul>
    <!-- 右侧弹层 -->
    <div class="layer">
      <h4 v-if="currCategory">
        {{ currCategory && currCategory.id === "brand" ? "分类" : "品牌" }}推荐
        <small>根据您的购买或浏览记录推荐</small>
      </h4>
      <!-- 商品 -->
      <ul v-if="currCategory && currCategory.goods">
        <li v-for="item in currCategory.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" :alt="item.name" />
            <div class="info">
              <p class="name ellipsis-2">{{ item.name }}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{ item.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌 -->
      <ul v-if="currCategory && currCategory.brands">
        <li class="brand" v-for="brand in currCategory.brands" :key="brand.id">
          <RouterLink to="/">
            <img :src="brand.picture" alt="" />
            <div class="info">
              <p class="place">
                <i class="iconfont icon-dingwei"></i>{{ brand.place }}
              </p>
              <p class="name ellipsis">{{ brand.name }}</p>
              <p class="desc ellipsis-2">{{ brand.desc }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { computed, reactive, ref } from "vue";
import { useStore } from "vuex";
import { findBrand } from "@/api/home";
import XtxSkeleton from "@/components/library/xtx-skeleton.vue";
export default {
    name: "HomeCategory",
    setup(props) {
        const store = useStore();
        // 最终数据 = 9个分类 + 1个品牌
        const brand = reactive({
            id: "brand",
            name: "品牌",
            children: [{ id: "brand-children", name: "品牌推荐" }],
            // 品牌列表
            barnds: [],
        });
        // 菜单数据
        const menuList = computed(() => {
            const list = store.state.category.list.map((item) => {
                return {
                    id: item.id,
                    name: item.name,
                    children: item.children && item.children.slice(0, 2),
                    goods: item.goods,
                };
            });
            list.push(brand);
            return list;
        });
        // 得到弹出层推荐商品数据
        const categoryId = ref(null); // 记录弹出层id
        const currCategory = computed(() => {
            return menuList.value.find((item) => item.id === categoryId.value);
        });
        // 获取品牌数据
        findBrand().then((data) => {
            brand.brands = data.result;
        });
        return { menuList, categoryId, currCategory };
    },
    components: { XtxSkeleton }
};
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,
      &.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  &:hover {
  .layer {
    display: block;
  }
}

}

// 弹层
.layer {
  width: 990px;
  height: 500px;
  background: rgba(255, 255, 255, 0.8);
  position: absolute;
  left: 250px;
  top: 0;
  display: none;
  padding: 0 15px;
  h4 {
    font-size: 20px;
    font-weight: normal;
    line-height: 80px;
    small {
      font-size: 16px;
      color: #666;
    }
  }
  ul {
    display: flex;
    flex-wrap: wrap;
    li {
      width: 310px;
      height: 120px;
      margin-right: 15px;
      margin-bottom: 15px;
      border: 1px solid #eee;
      border-radius: 4px;
      background: #fff;

      &:nth-child(3n) {
        margin-right: 0;
      }
      a {
        display: flex;
        width: 100%;
        height: 100%;
        align-items: center;
        padding: 10px;
        &:hover {
          background: #e3f9f4;
        }
        img {
          width: 95px;
          height: 95px;
        }
        .info {
          padding-left: 10px;
          line-height: 24px;
          width: 190px;
          .name {
            font-size: 16px;
            color: #666;
          }
          .desc {
            color: #999;
          }
          .price {
            font-size: 22px;
            color: @priceColor;
            i {
              font-size: 16px;
            }
          }
        }
      }
    }
    // 品牌样式
    li.brand {
      height: 180px;
      a {
        align-items: flex-start;
        img {
          width: 120px;
          height: 160px;
        }
        .info {
          p {
            margin-top: 8px;
          }
          .place {
            color: #999;
          }
        }
      }
    }
  }
}

// 骨架动画
xtx-skeleton {
  animation: fade 1s linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
</style>
